Android Orientation Sensor (Direction Sensor) details and applications, androidorientation
I. Preface
This blog is my first article on "Android advanced". It has been around for more than four months since I started Android, and I have some experiences, I can also do som
The instructor of the fetc project proposed a new requirement. He wanted to show the user's current movement direction in the game map. If he used GPS, it was obviously unreliable, so he thought of the powerful Android sensor...
Many mobile devices have built-in sensors. Android abstracts these sensors through the sensor
Android action sensor and android Sensor
Android motion sensor
The Android platform supports some sensors used to monitor device movements (five such sensors ). Two of them are pure har
Android --- 57 --- sensor, android Sensor
The Android system provides support for sensors.Developing an application sensor is simple. You only need to register a listener for the specified listener.
Steps:1. Call the getSystemServ
)
Proximity sensor)
Light sensor)
Pressure sensor)
Temperature sensor)
Gravity sensor (introduced in Android 2.3)
Linear acceleration sensor (introduced in
ObjectiveAndroid provides support for device sensors, and as long as the Android device's hardware provides these sensors, Android apps can access the device's external conditions through sensors, including the phone's running status, the current orientation, and so on. The Android system also provides drivers to manage these
Android development: Android device sensor Development Summary
Android sensor development process
Public class sens?ti=extends Activity implements SensorEventListener {private SensorManager mSensorManager; private Sensor mSensor;
This article describes how to obtain a list of sensors supported by your Android device.Currently, Android 4.4 (API level 19) supports the following sensors:Type_accelerometer Accelerometer, Unit m/s2, measurement of the accelerometer type values (sensors type) applied to the device x, Y, Z axes: 1 (0x00000001) Type_ambient_ Temperature temperature sensor, Unit i
This example describes Android's ability to create an Android dynamometer using the sensor sensor to refresh the UI in a thread. Share to everyone for your reference, specific as follows:
In the previous article, "Android based on sensor sensors to obtain gravitational indu
Android open-source project Sensors
The android open-source project (aosp) provides three software-based mobile sensors: gravity sensor, linear acceleration sensor, and rotation vector sensor. These three sensors are updated in android4.0 and both use Gyroscope (except for o
This time we have studied the development of Android sensors, previously introduced, tween use, so we can combine sensors with tween animation, develop a simple compass.First of all, introduce the sensor knowledge,in the the use of sensors in Android applications depends on the Android.hardware.SensorEventListener interface. This interface allows you to monitor v
This article illustrates how Android uses the sensor sensor to get the direction of a user's movement. Share to everyone for your reference, specific as follows:
Today continue to share a second important sensor, in fact, to get the direction of the things should be very simple, in the previous article to see that the
Android Basics Getting Started Tutorial--10.11 sensor Special (2)--direction sensortags (space delimited): Android Basics Getting Started TutorialIntroduction to this section:
In the previous section we learned about some of the basic concepts of sensors, and learned about the use of sensor routines,The
In general, getting the location information of the phone in the Android system has the Type_orientation constant in the API, which can be obtained as the accelerometer sensor Sm.getdefaultsensor (sensor.type_ ORIENTATION); However, we do so in the latest version of the SDK will see this sentence: "Type_orientation this constant is deprecated. Use Sensormanager.getorientation () instead. "That way also expi
1. Architecture
2. Data Structure
3. Four major functions
In this paper, G-sensor is used as an example to explore the android hierarchy.
1. Architecture
The architecture of android can be divided into four layers.
The first layer is the underlying driver layer, which includes the standard Linux, Android core drive
The Android platform provides several sensors that can monitor the movement of devices. Two of them are hardware-based (accelerometer and gyroscope). Three sensors can be hardware-based, it can also be software-based (Gravity Sensors, linear acceleration sensors, and rotating vector sensors ). For example, some software sensor-based devices extract their data from the accelerometer and the magnetic
Sensor overviewSensors are one of the important symbols of the second generation of smartphones. Many phones and tablets are now built-in with sensors (except TV). The Android SDK supports a number of more than 10 sensors, but the phone only supports a subset. such as the direction sensor (electronic compass) and the gravity
The latest version of the SDK adds the phrase "type_orientation this constant is deprecated. Use Sensormanager.getorientation () instead. This means that the method has been canceled, and the developer uses sensormanager.getorientation () to get the original data.In fact, the Android get direction is obtained by the magnetic field sensor and the accelerometer sensor
the Rotated Vector is non-unit. The definition of the X, Y, and Z axes is the same as that of the accelerometer. The reference coordinate system is defined by direct orthogonal basis (1)
Figure 1. coordinate system used by the rotating vector sensor
This coordinate system has the following features:
1. the X axis is defined by the vector product yxz. It is tangent to the ground at the current position of the device and points to the east;
2. the Y a
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